/*
 * CodePress - Real Time Syntax Highlighting Editor written in JavaScript - http://codepress.org/
 * 
 * Copyright (C) 2007 Fernando M.A.d.S. <fermads@gmail.com>
 *
 * Developers:
 *		Fernando M.A.d.S. <fermads@gmail.com>
 *		Michael Hurni <michael.hurni@gmail.com>
 * Contributors: 	
 *		Martin D. Kirk
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the 
 * GNU Lesser General Public License as published by the Free Software Foundation.
 * 
 * Read the full licence: http://www.opensource.org/licenses/lgpl-license.php
 */
var methods;

CodePress = {
		scrolling : false,
		autocomplete : true,

		// set initial vars and start sh
		initialize : function() {
	if(typeof(editor)=='undefined' && !arguments[0]) return;
	body = document.getElementsByTagName('body')[0];
	body.innerHTML = body.innerHTML.replace(/\n/g,"");
	chars = '|32|46|62|8|'; // charcodes that trigger syntax highlighting
	cc = '\u2009'; // carret char
	editor = document.getElementsByTagName('pre')[0];
	document.designMode = 'on';
	document.addEventListener('keypress', this.keyHandler, true);
	window.addEventListener('scroll', function() { if(!CodePress.scrolling) CodePress.syntaxHighlight('scroll') }, false);
	completeChars = this.getCompleteChars();
	completeEndingChars =  this.getCompleteEndingChars();
},

// treat key bindings
keyHandler : function(evt) {
	keyCode = evt.keyCode;	
	charCode = evt.charCode;
	fromChar = String.fromCharCode(charCode);

	if((evt.ctrlKey || evt.metaKey) && evt.shiftKey && charCode!=90)  { // shortcuts = ctrl||appleKey+shift+key!=z(undo) 
		CodePress.shortcuts(charCode?charCode:keyCode);
	}
	else if( (completeEndingChars.indexOf('|'+fromChar+'|')!= -1 || completeChars.indexOf('|'+fromChar+'|')!=-1) && CodePress.autocomplete) { // auto complete
		if(!CodePress.completeEnding(fromChar))
			CodePress.complete(fromChar);
	}
	else if(chars.indexOf('|'+charCode+'|')!=-1||keyCode==13) { // syntax highlighting
		top.setTimeout(function(){CodePress.syntaxHighlight('generic');},100);
	}
	else if(keyCode==9 || evt.tabKey) {  // snippets activation (tab)
		CodePress.snippets(evt);
	}
	else if( keyCode==13)
	{
		alert("HEI");
		//CodePress.getRangeAndCaret();
	}
	else if(keyCode==46||keyCode==8) { // save to history when delete or backspace pressed
		CodePress.actions.history[CodePress.actions.next()] = editor.innerHTML;
	}
	else if((charCode==122||charCode==121||charCode==90) && evt.ctrlKey) { 
		// undo and redo
		(charCode==121||evt.shiftKey) ? CodePress.actions.redo() :  CodePress.actions.undo(); 
		evt.preventDefault();
	}
	else if(charCode==118 && evt.ctrlKey)  { // handle paste
		CodePress.getRangeAndCaret();
		top.setTimeout(function(){CodePress.syntaxHighlight('generic');},100);
	}
	else if(charCode==99 && evt.ctrlKey)  { // handle cut
		//alert(window.getSelection().getRangeAt(0).toString().replace(/\t/g,'FFF'));
	}

},

// put cursor back to its original position after every parsing
findString : function() {
	if(self.find(cc))
		window.getSelection().getRangeAt(0).deleteContents();
},

// split big files, highlighting parts of it
split : function(code,flag) {
	if(flag=='scroll') {
		this.scrolling = true;
		return code;
	}
	else {
		this.scrolling = false;
		mid = code.indexOf(cc);
		if(mid-2000<0) {ini=0;end=4000;}
		else if(mid+2000>code.length) {ini=code.length-4000;end=code.length;}
		else {ini=mid-2000;end=mid+2000;}
		code = code.substring(ini,end);
		return code;
	}
},

getEditor : function() {
	if(!document.getElementsByTagName('pre')[0]) {
		body = document.getElementsByTagName('body')[0];
		if(!body.innerHTML) return body;
		if(body.innerHTML=="<br>") body.innerHTML = "<pre> </pre>";
		else body.innerHTML = "<pre>"+body.innerHTML+"</pre>";
	}
	return document.getElementsByTagName('pre')[0];
},

// syntax highlighting parser
syntaxHighlight : function(flag, methods2) {
	if( methods2 != null )
		methods = methods2;
	
	lines = methods.split('\n');
	lines.pop();

	if(flag != 'init') { window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));}
	editor = CodePress.getEditor();
	o = editor.innerHTML;
	o = o.replace(/<br>/g,'\n');
	o = o.replace(/<.*?>/g,'');
	x = z = this.split(o,flag);
	x = x.replace(/\n/g,'<br>');

	if(arguments[1]&&arguments[2]) x = x.replace(arguments[1],arguments[2]);
	var sRegExInput;
	for(i=0;i<Language.syntax.length;i++) 
		x = x.replace(Language.syntax[i].input,Language.syntax[i].output);

	var temp;
	var temp2;
	var temp3;
	var evalstring = "";		
	var temp3;
	var test2;

	for(j=0;j<lines.length; j++) {
		lines[j] = lines[j].replace(/\s+$/,"");
		temp = lines[j].split(' ');

		temp2 = temp.join( "(\\s+|\\s*\\|.*?\\|\\s*)" );
		
		temp3 = temp.join(" ");		

		test2 = "";
		for (var i = 0; i<temp.length; i++) {

			test2 += "<s>"+temp[i]+"</s>";

			if (i != temp.length-1)
				test2 += "$"+(i+1);
		}		

		eval('x = x.replace(/'+temp2+'/g, \"'+ test2 + '\")');
	}

	editor.innerHTML = this.actions.history[this.actions.next()] = (flag=='scroll') ? x : o.replace(z,x);
	if(flag!='init') this.findString();
},

getLastWord : function() {
	var rangeAndCaret = CodePress.getRangeAndCaret();
	words = rangeAndCaret[0].substring(rangeAndCaret[1]-40,rangeAndCaret[1]);
	words = words.replace(/[\s\n\r\);\W]/g,'\n').split('\n');
	return words[words.length-1].replace(/[\W]/gi,'').toLowerCase();
},

snippets : function(evt) {
	var snippets = Language.snippets;	
	var trigger = this.getLastWord();
	for (var i=0; i<snippets.length; i++) {
		if(snippets[i].input == trigger) {
			var content = snippets[i].output.replace(/</g,'&lt;');
			content = content.replace(/>/g,'&gt;');
			if(content.indexOf('$0')<0) content += cc;
			else content = content.replace(/\$0/,cc);
			content = content.replace(/\n/g,'<br>');
			var pattern = new RegExp(trigger+cc,'gi');
			evt.preventDefault(); // prevent the tab key from being added
			this.syntaxHighlight('snippets',pattern,content);
		}
	}
},

readOnly : function() {
	document.designMode = (arguments[0]) ? 'off' : 'on';
},

complete : function(trigger) {
	window.getSelection().getRangeAt(0).deleteContents();
	var complete = Language.complete;
	for (var i=0; i<complete.length; i++) {
		if(complete[i].input == trigger) {
			var pattern = new RegExp('\\'+trigger+cc);
			var content = complete[i].output.replace(/\$0/g,cc);
			parent.setTimeout(function () { CodePress.syntaxHighlight('complete',pattern,content)},0); // wait for char to appear on screen
		}
	}
},

getCompleteChars : function() {
	var cChars = '';
	for(var i=0;i<Language.complete.length;i++)
		cChars += '|'+Language.complete[i].input;
	return cChars+'|';
},

getCompleteEndingChars : function() {
	var cChars = '';
	for(var i=0;i<Language.complete.length;i++)
		cChars += '|'+Language.complete[i].output.charAt(Language.complete[i].output.length-1);
	return cChars+'|';
},

completeEnding : function(trigger) {
	var range = window.getSelection().getRangeAt(0);
	try {
		range.setEnd(range.endContainer, range.endOffset+1)
	}
	catch(e) {
		return false;
	}
	var next_character = range.toString()
	range.setEnd(range.endContainer, range.endOffset-1)
	if(next_character != trigger) return false;
	else {
		range.setEnd(range.endContainer, range.endOffset+1)
		range.deleteContents();
		return true;
	}
},

shortcuts : function() {
	var cCode = arguments[0];
	if(cCode==13) cCode = '[enter]';
	else if(cCode==32) cCode = '[space]';
	else cCode = '['+String.fromCharCode(charCode).toLowerCase()+']';
	for(var i=0;i<Language.shortcuts.length;i++)
		if(Language.shortcuts[i].input == cCode)
			this.insertCode(Language.shortcuts[i].output,false);
},

getRangeAndCaret : function() {	
	var range = window.getSelection().getRangeAt(0);
	var range2 = range.cloneRange();
	var node = range.endContainer;			
	var caret = range.endOffset;
	alert( caret);
	range2.selectNode(node);	
	return [range2.toString(),caret];
},

insertCode : function(code,replaceCursorBefore) {
	var range = window.getSelection().getRangeAt(0);
	var node = window.document.createTextNode(code);
	var selct = window.getSelection();
	var range2 = range.cloneRange();
	// Insert text at cursor position
	selct.removeAllRanges();
	range.deleteContents();
	range.insertNode(node);
	// Move the cursor to the end of text
	range2.selectNode(node);		
	range2.collapse(replaceCursorBefore);
	selct.removeAllRanges();
	selct.addRange(range2);
},

//get code from editor
getCode : function() {
	if(!document.getElementsByTagName('pre')[0] || editor.innerHTML == '')
		editor = CodePress.getEditor();	
	var code = editor.innerHTML;
	code = code.replace(/<p>/g,'\n');
	code = code.replace(/<br>/g,'\n');
	code = code.replace(/\u2009/g,'');
	code = code.replace(/<.*?>/g,'');
	code = code.replace(/&lt;/g,'<');
	code = code.replace(/&gt;/g,'>');
	code = code.replace(/&amp;/gi,'&');		
	return code;
},

// put code inside editor
setCode : function() {
	var code = arguments[0];
	//alert( code );
	code = code.replace(/\u2009/gi,'');
	code = code.replace(/&/gi,'&amp;');
	code = code.replace(/</g,'&lt;');
	code = code.replace(/>/g,'&gt;');
	editor.innerHTML = code;
	if (code == '')
		document.getElementsByTagName('body')[0].innerHTML = '';
},



// undo and redo methods
actions : {
	pos : -1, // actual history position
	history : [], // history vector

	undo : function() {
	editor = CodePress.getEditor();
	if(editor.innerHTML.indexOf(cc)==-1){
		if(editor.innerHTML != " ")
			window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));
		this.history[this.pos] = editor.innerHTML;
	}
	this.pos --;
	if(typeof(this.history[this.pos])=='undefined') this.pos ++;
	editor.innerHTML = this.history[this.pos];
	if(editor.innerHTML.indexOf(cc)>-1) editor.innerHTML+=cc;
	CodePress.findString();
},

redo : function() {
	// editor = CodePress.getEditor();
	this.pos++;
	if(typeof(this.history[this.pos])=='undefined') this.pos--;
	editor.innerHTML = this.history[this.pos];
	CodePress.findString();
},

next : function() { // get next vector position and clean old ones
	if(this.pos>20) this.history[this.pos-21] = undefined;
	return ++this.pos;
}
}
}

Language={};
window.addEventListener('load', function() { CodePress.initialize('new'); }, true);

Language.syntax = [
                   { input : /\"(.*?)(\"|<br>|<\/P>)/g, output : '<s>"$1$2</s>' }, // strings double quote
                   { input : /\'(.*?)(\'|<br>|<\/P>)/g, output : '<s>\'$1$2</s>' }, // strings single quote
                   { input : /\b(abstract|continue|for|new|switch|default|goto|boolean|do|if|private|this|break|double|protected|throw|byte|else|import|public|throws|case|return|catch|extends|int|short|try|char|final|interface|static|void|class|finally|long|const|float|while|function|label)\b/g, output : '<b>$1</b>' }, // reserved words
                   { input : /([\(\){}])/g, output : '<em>$1</em>' }, // special chars;
                   { input : /([^:]|^)\/\/(.*?)(<br|<\/P)/g, output : '$1<i>//$2</i>$3' }, // comments //
                   { input : /\/\*(.*?)\*\//g, output : '<i>/*$1*/</i>' } // comments /* */
                	   ]

                	   Language.snippets = []

                	                        Language.complete = [
                	                                             { input : '\'', output : '\'$0\'' },
                	                                             { input : '"', output : '"$0"' },
                	                                             { input : '(', output : '\($0\)' },
                	                                             { input : '[', output : '\[$0\]' },
                	                                             { input : '{', output : '{\n\t$0\n}' }		
                	                                             ]

                	                                             Language.shortcuts = []